单选题某些采用预防维修不经济的耗损性设备，应采用（）。A状态维修B定时维修C事后维修D视情维修
单选题
某些采用预防维修不经济的耗损性设备，应采用（）。
A
状态维修
B
定时维修
C
事后维修
D
视情维修
参考解析
解析：
暂无解析
相关考题：
单选题With reference to operating a four-ram steering gear system under emergency conditions, which one of the following statements is incorrect?（）AOnly one pump should be used at any timeBThe ship speed should be reduced to 70% of the normalCWatch keeping of the steering gear should be increasedDLimitations of the steering gear should be logged but the bridge need not be informed
单选题所有梯道、走廊和起居处所内脱险通道要求的感烟探测器应在烟密度超过（）每米减光率之前动作。但在烟密度超过（）每米减光率之前不应动作。A10.5％；2％B11.5％；2％C12.5％；2％D13.5％；3％
单选题General information on enroute weather and climate is found in（）.Athe Sailing Directions and the Coast PilotBa weather faxCthe Local Notice to MarinersDthe Light List
单选题下列哪一个求天体方位的计算公式正确（）。AcotＡ＝tanDeccosφsecLHA＋sinφcotLHABcotＡ＝tanDeccosφcscLHA＋sinφcotLHACcotＡ＝tanDeccosφcscLHA－sinφcotLHADcotＡ＝tanDeccosφcscLHA－sinφtanLHA
单选题当航进中的船舶遇到浅滩的突出部分或以小角度接近浅滩时，由于压垫效应，（）。A船尾会先偏离浅滩，造成偏航B船首和船尾会同时偏离浅滩，不会造成偏航C船首和船尾会同时靠向浅滩，造成搁浅的危险D船首会先偏离浅滩，造成偏航
单选题C级分隔是指（） Ⅰ.用认可的不燃材料制成； Ⅱ.经标准耐火试验后能防止烟及火焰通过； Ⅲ.限制背火面的温升； Ⅳ.允许使用厚度不超过2.5mm的可燃装饰板。AⅠ，ⅣBⅡ，ⅣCⅠ，ⅢDⅠ，Ⅱ，Ⅲ
单选题Which factor determines the ring dam size for a fuel oil, tubular bowl type, centrifugal purifier?（）AThe viscosity off the fuelBThe quantity of water to be removed from the fuelCThe specific gravity of the fuelDThe quantity of dirt to be removed from the fuel
单选题A stream of water immediately surrounding a moving vessel’s hull，flowing in the same direction as the vessel is known as（）.Adirectional currentBforward currentCpropeller currentDwake current